Boat-motor.



osciiii WALFRID nonabrsfrocniiotin, sii/'EDEN'.

BAT-MGTOR.

Licencia,

Specification of Letters Patent.

rammed nay i, isis.

i l Y appfiaan med augustin/i. seriaiiiecaasw.

2"() all @zi/Omit may concerny subject of the King oi Sweden, and residentlie it known that l, OSCAR lALrnin HULT,

oil l Ine'dalsgatan, Stockholnnin the Kingdom of Sweden, engineer', have invented certa in new and useful Improvements in Boat- Motors, of which the following is a specification, reference being made to the accompanying drawing.

The present inventionrelates to the balancing of such boat motors, in 'which the work is carried out by a reciprocating piss ton or, as the case may be by several reciprocating pistons actingin the same direction.

On the accompanying drawing' the invention is by way of example shown applied to so-called outboard motors (which, however, may also be mounted inboard) v Figures l and 2 show each a vertical section of such a motor.

ln accordance 4with Fig. 1 the motor shaft A is provided with two cranks which are situated di'anietrically with regard' to the shaft and which cranks are, by means of connecting rods B and C, connected to pisthus, through the piston, serveas guidenecting rod J, can thereby be balanced. A l part of the weight of the connecting rod J' lenGtlis D tons D and F. l) is the working piston,v

which is directly acted upon by the motive charges tliecylinder E. F is a balancing piston, which is adapted to annui the momentum of the piston D when turning in the end positions,while at the saine time constituting the fastening of the 'upper end of the connecting rod J of the propeller shaft I. The cylinder H 'of the piston -Fl will for the upper end ofthe connecti-ng'rod J.

In' the motor, shown inl Fig. 1,- the two cranks of 'the inotor shaft are ofl equal The invention may, however, also be carried ont advantageously according to Fig. 2, that is to say so, that the crank of the piston F is shorter than that of the piston D. This is advantageous for the' rea- -Son that the greater weight which loadstheI piston F, because this also carries the concan also--as is usual-be balanced by a counter-Weight on the crank portion'oi` the driving or propeller shaft l.` The working piston and the balancing piston may evidently have different diameters.

By means of the arrangement according to Fig, 2 the diameter oi the crank casing Having thus described my invention vwhat,

l claim as new and desire to secure by Letters Patent is l. in amotor the combination of, a working piston, a motor shaft having a crank connected with said piston, a balancing piston also connected with -a crank on said niotor shaft, and a driving shaft having a c rank connected with said balancing piston. ,'2. ln a-inotor the combination'of a Working piston, a balancingpiston having' its axis substantially in alinement with the axis of said working piston, a motor shaft located between said pistons, means J'or connecting said pistons tov diainetrically'- opposed cranks on said motor shaft, a driving shaft, and means for voperating said driving shaft from said balancing piston.

l 3. ln alinotor the combination of la working piston, a balancing piston havingy its `airis substantially in alnement with the axis of. said vworking piston, a motor sha-ift located between said pistons, means for connecting said pistons to dianietrically 'kopposed cranks on said motor shaft, the crank connected to the balancing piston being shorter than the one connected to the work- 4ing piston, a driving shaft, and means for operating said driving shaft from said bal- -ancing piston.

4. ln a boat motor, the combination of a working piston, a balancing piston having its axis substantially in alineinent with the axis oi said Working piston, a motor shaft located lbetween said' pistons, connecting rods connecting said pistons to diametrically opposed cranks on said motor shaft, a

propeller shaft, and a connecting rod connecting said balancing piston to a crank on said propeller shaft.

5. lin a boat motor, working piston, a balancing piston having the combination of a memo@ ite axis'ubstantaly n alinement with 'the ing rod connecting said balancing piston to :uns of said Working plstom a motor shat a cronkon said propeller shaft. located between saxd pistons conneotmg rods In Wltness whereof have hereunto Set 1 0 conneoing said pistons to iametrpally opmy hand in presence of two Wnesses.

5 posed cranks on said motor shaft, the crank OSCAR VVALFRD HULT.

connected to the balancing piston being Wtnessegf: shorter thanthe one oonneoted to the `Work GRETA PRIEN,

ing piston, a propeller sheft, and a connect; H! B. HLssoN. 

